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Broadcom OTP memory controller

Required Properties:
- compatible: "brcm,ocotp" for the first generation Broadcom OTPC which is used
  in Cygnus and supports 32 bit read/write. Use "brcm,ocotp-v2" for the second
  generation Broadcom OTPC which is used in SoC's such as Stingray and supports
  64-bit read/write.
- reg: Base address of the OTP controller.
- brcm,ocotp-size: Amount of memory available, in 32 bit words

Example:

otp: otp@301c800 {
	compatible = "brcm,ocotp";
	reg = <0x0301c800 0x2c>;
	brcm,ocotp-size = <2048>;
};